Granted Patent
Utility
US 5,927,238 · App. 09/029,259
Valve timing for four stroke internal combustion engines
Inventor:
Stephen James Watson
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Mar 6, 1998
Inventor
Stephen James Watson
Assignee (at issue)
Orbital Engine Company (Australia) Pty Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.